Basically, a four-stroke engine which is provided whit the turbocharger
has a higher suction pressure than surrounding atmosphere pressure. This is due
to the forcing of atmospheric pressure go into cylinder during the suction step.
Turbocharger is utilized to enlarging the motor power (30-80%). The result
reveals that by using turbocharger, value of thermal efficiency, mechanical
efficiency, and volumetric have a big impact toward the temperature whit pressure
as 1.03 Atm or 104.3647 Kpa on volume machine 1,000 cc on rotary 4,000 RPM.
Thus, the bigger the total Wnett, the smaller the total thermal efficiency. The
greater the Pa, the greater the greater the Nm (mechanical efficiency). Also, the
greater the Pa, the Nv.